JPH0444078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a pier used for pouring concrete for a floor portion in tunnel construction, outdoor construction, or the like.

<Prior Art> For example, in tunnel construction, whether or not the passageway from the face to the tunnel entrance is secured has a great influence on all the work.

Therefore, the floor of the tunnel (invert)
When pouring concrete into a tunnel, it is important to minimize the impact on traffic within the tunnel.

For this reason, in the past, invert construction was done in half and the remaining half was used for traffic.

<Problems with conventional techniques> The conventional construction methods described above have the following problems.

<B> The Natom construction method, which has been widely adopted recently, requires the entire cross section of the tunnel to be closed as soon as possible.

However, with the above-mentioned construction method, the construction is divided into two halves, which makes it impossible to close them quickly.

<B> By constructing the tunnel in half, incomplete concrete pouring is created in the axial direction of the tunnel, making it impossible to integrate the important invert.

<C> Since one side will be used as a passage for vehicles, it will be necessary to perform mountain retaining work during construction.

<D> In the section where there is spring water, the remaining half of the path became muddy during the concrete pouring work, which not only caused a hindrance to vehicle traffic, but also
The ground becomes loose and many structural problems occur.

<E> Spraying at NATM generates a large amount of dust, which not only has a negative impact on the human body but also reduces visibility and hinders work.

For this purpose, a dust collector can be installed, but since the spraying work area moves forward every day, there is no point in keeping the dust collector fixed.

However, since dust collectors are large, there is no suitable place to install them in narrow tunnel sites where many tasks overlap, and the reality is that they are not able to function to their full potential.

<F> Concrete for the floor needs to be poured over a wide area, but the conventional method is to use a long chute or conveyor to pour concrete gradually backing up from the edge of the unfilled area. It was something that was coming.

However, the method using a long conveyor or the like requires a long time for pouring and is uneconomical.

<Object of the present invention> The present invention was made to improve the above-mentioned drawbacks, and an object of the present invention is to provide a pier as follows.

<B> A pier for concrete construction of the floor section that allows the entire section to be quickly closed without causing any hindrance to traffic inside the tunnel.<B> A floor section that can perform the function of a sufficient dust collector. Pier for concrete construction <C> A pier for concrete construction on the floor where concrete can be poured over a wide area by transporting it to a close distance using a mixer truck without using a conveyor etc. < Solving the problem Means for Concrete Construction> Next, an embodiment of a pier for concrete construction of a floor portion according to the present invention will be described.

<A> Frame The pedestal 1 is composed of a floor plate 11 and side walls 12 erected on both sides thereof.

Both the floor plate 11 and the side walls 12 are made of a strong and lightweight structure such as a truss.

Further, at a position orthogonal to the side wall 12, a tilting plate 13 on the face side and a tilting plate 14 on the wellhead side are tilted down or raised almost vertically using a jack, lever block 19, chain block, baby winch, or other force. Configure it so that it can be used.

Under the floor on the lower surface of the side wall 12, an underfloor rail 15 is provided parallel to the side wall 12.

Two underfloor rails 15 are provided parallel to the side walls 12, and a movable cart 4, which will be described later, is slidably attached to each rail 15.

<B> Hydraulic jack Attach the hydraulic jack 2 vertically to the four corners of the pedestal 1.

By expanding and contracting this jack 2, the pedestal 1 can be moved up and down.

<C> Wheels There are two types of wheels on the pedestal 1, namely a fixed trolley 3.
and a moving trolley 4 are provided.

The fixed trolley 3 is located on one side of the pedestal 1 (the entrance side)
These are regular wheels installed under the floor near the edge of the building.

On the other hand, the movable trolley 4 is slidably attached to the above-mentioned underfloor rail 15 provided on the other side (exit side) of the pedestal 1 by a structure as shown in FIG.

That is, two arms 42 are raised parallel to both ends of the truck 41, and engagement wheels 43 are rotatably attached to the upper ends of the arms 42.

Furthermore, four or more underfloor wheels 44 that rotate in parallel with the underfloor rail 15 are rotatably attached to the trolley 41.

Then, the engagement wheel 43 at the upper end of the arm 42 is rotatably engaged with the underfloor rail 15.

<d> Direction correction device A direction correction device 7 is further provided at the center of the pedestal 1.

This device 7 is composed of a correction jack 71 vertically attached to the center of the pedestal 1, and wheels 72 attached to the lower part of the correction jack 71.

The jack 71 and the wheel 72 are connected by a vertical pin so that the traveling direction of the wheel 72 can be freely changed.

<E> Dust collector A gate structure will be installed across the side walls on both sides.

A dust collector 8 is attached to the upper part of this gate structure 81, and is configured to collect and discharge dust in a direction parallel to the central axis of the pedestal 1.

The height of the gate structure 81 is set so that various construction vehicles can sufficiently pass through the lower part thereof.

<G> Moving chute One edge of the scaffold 18 is pivotally supported on the lower edge of the side wall 12, and the scaffold 1 is moved by using jacks, lever blocks, chain blocks, baby winches, or other methods.
8 is configured so that it can be folded down or raised almost vertically.

A guide rail 16 in the form of a curtain rail is attached to the outside of the horizontal girder corresponding to the balustrade of the side wall 12.

This guide rail 16 is provided with a roller that fits and slides, and the chute 17 is lifted from this roller.

Therefore, by simply lifting and pushing the chute 17, the chute 17 will smoothly slide in a direction parallel to the central axis of the pedestal 1.

<H> Earth and sand loading device A conveyor 9 is installed parallel to the outside of one side wall 12.

It is installed at a low position near the floor along the tilting plate 13, and its upper end projects beyond the upper part of the side wall 12 into the frame 1.

Next, the operating method will be explained.

<A> Installation of the pedestal 1 (Fig. 3) The pedestal 1 is installed on the invert concrete 5 that has been completely poured.

At this time, the jacks 2 on the entrance side of the frame 1 are installed on the invert concrete 5, and the jacks 2 on the exit side are installed on the ground near the finished end of pouring (that is, in the unpoured area).

In this state, the inclined plate 13 on the entrance side of the pedestal 1
The inclined plate 14 on the exit side is stretched over the completed concrete 5 and the unexcavated portion.

<B> Excavation (Figure 4) In order to place the next invert concrete, the unexcavated area must be excavated to lower the road surface.

Therefore, the roadbed 6 is excavated. Although traffic is not possible during this excavation, the time is so short that it is easy to adjust the work cycle so as not to interfere with other works.

The excavated earth and sand can be loaded onto a truck or the like that has climbed onto the pedestal 1 by simply throwing it into the lower part of the conveyor 9 outside the pedestal 1, and can be carried out to the outside of the tunnel.

Therefore, the excavator does not have to extend its arm to the truck bed, improving work efficiency.

<C> Moving the pedestal (Figure 5) When the excavation is completed by about half of the length of the pedestal 1, move the pedestal 1.

To move it, first shorten all the hydraulic jacks 2.

As a result, the wheels of the fixed trolley 3 and the mobile trolley 4
The lower surface of the trolley 41 is grounded on the concrete.

If you pull the pedestal 1 with an excavator etc. in this state,
Since the entire weight of the frame 1 is supported by two types of wheels, it can easily move forward toward the inside of the tunnel. Also, at least during this movement, it is better to lift the chute 17 and scaffolding 18 with rollers.
This is desirable because the pedestal moves forward without resistance.

If the gantry 1 is moved forward by more than half its length, the weight of the front part becomes heavier than the movable cart 4, and the front part will be tilted.

At that point, we stopped the advance and excavated the remaining half of the hole.

<D> Repositioning the movable cart (Fig. 6) When the excavation is completed, extend all the jacks 2 again and lift the pedestal 1. As a result, the movable trolley 4 is free to slide, so that only the movable trolley 4 is pulled forward and moved.

In this state, if you shorten the jack 2 again and pull the pedestal 1 forward, the pedestal 1 will be
Since the entire weight of is supported by the underfloor wheels 44 on the truck 41 and the wheels of the fixed truck 3, the gantry 1 can be moved forward by the range that has been excavated in this round.

<E> Opening for traffic If the slope plate 14 on the exit side is lowered in this state, the pedestal 1 will connect the road slab 6 scheduled for next excavation with the concrete surface that has already hardened, and the vehicle will pass over the pedestal 1. As a result, traffic between the shaft and the face is free.

<F> Placing concrete (FIGS. 7 and 8) To pour concrete under the pedestal 1, first lower the scaffolding 18, and then move the chute 17 along the guide rail 16 to a predetermined position.

Next, a mixer truck is mounted on the pedestal 1 and concrete is poured directly into the chute 17.

Since the chute 17 is short, concrete separation does not occur and a large amount of concrete can be placed quickly in a short period of time.

The concrete under the pedestal 1 is unaffected by traffic, so it is possible to pour good quality concrete through careful work and allow it to cure sufficiently.

<G> Direction correction When it is desired to correct the direction of the pedestal 1, the direction of rotation of the wheels 72 of the correction device 7 is positioned in a direction perpendicular to the pedestal 1, and then the jack 71 is extended.

Then, one of the jacks 2 supporting the pedestal 1 is shortened so that nearly half of the weight of the pedestal 1 is borne by the wheels 72 of the correction device 7.

If the pedestal 1 is pushed from the side in this state, one end of the pedestal 1 will easily change direction.

<H> Dust collection and exhaust In addition to the NATM spraying, there is a lot of dust on the face side, such as the flying up of excavated soil.

Therefore, the dust collector 8 mounted on the mount is rotated to collect dust that tends to accumulate near the face and discharge it to the mine entrance side.

<Effects of the Present Invention> Since the present invention is as described above, the following effects can be expected.

<B> Since invert concrete can be placed without dividing the traffic route in half, concrete can be placed without interfering with other work, which was the bottleneck of conventional work. can.

<B> Placing concrete on only half of the traffic route and leaving the other half excavated will leave the entire tunnel cross-section unclosed for a long period of time.

In the construction method of the present invention, invert concrete is not divided and the entire cross section is closed at an early stage after excavation, so it is extremely safe.

<C> Since the pier of the present invention moves lightly and quickly using wheels, it is possible to complete the placement of invert concrete in a short time.

<D> Since a chute that can be moved easily is installed on the outside of the pier, concrete can be poured from close range in a short time using a mixer truck.

Therefore, although there are trade-offs with other traffic, there is no risk of concrete clogging compared to when pumping by pump truck, and concrete can be placed extremely quickly.

<E> Since the conveyor is installed outside the pier, the excavator does not have to do the careful work of reaching out to the loading platform of the truck and carefully loading the earth and sand.

Therefore, extremely efficient excavation can be performed.

＜F＞ We decided to mount the dust collector on the stand, which was a problem because there was no place to install it in the past.

Therefore, it is possible to advance sequentially as the face moves, and it is also possible to collect and discharge dust at all times without causing any hindrance to vehicles or other operations.

[Brief explanation of drawings]

Figure 1: Perspective view of the concrete construction pier for the main floor, Figure 2: Explanation of the moving trolley, Figures 3 to 7: Explanation of the construction sequence, Figure 8: Explanation of the concrete placement state. figure. 1... Frame, 2... Jacket, 4... Moving trolley, 15... Underfloor rail, 5... Concrete,
6...Roadbed.

Claims (1)

[Scope of Claims] 1. A mount for vehicle traffic is provided with a jack that moves the mount up and down and wheels that support the mount, and moves forward while alternately moving the mount using the wheels and raising the mount using the jacks. A drawbridge-like concrete casting scaffold that can be lifted and suspended is installed on the outside of the pedestal, and a concrete casting chute is installed on the concrete casting scaffold so that it can slide in a direction parallel to the central axis of the pedestal. , A pier for concrete construction on the floor with a dust collector mounted on the top of the pedestal and a conveyor attached to the side of the pedestal.